US3012104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recording and apparatus for recording signals
Assignee: US Philips Corp
•
Filing: 1955-04-04
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Granted: 1961-12-05
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Expires: 1975-04-04
Abstract
No abstract record available.
Inventors
- 👤 Kleis Derk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:36
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B5/2652; G11B5/2654; G11B5/2655; G11B5/2657; G11B5/2658; G11B5/02; G11B5/027; G11B5/03
Claims Analysis
Total Claims: 0
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US2803708A
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US2785232A
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US2675430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |